Yieldable driving-gear.



PATENIED AUG. 11, 1908,

W. G. SCHAEPPER. YIELDABLE DRIVING GEAR.

APPLICATION FILED NOV.B.1907.

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\\'ILLIA. G. SCHAEFFER, OF READING, PENNSYLVANIA, ASSIGXOm-TA'DINGFSTANDARD COMPANY, OF READING, PENNSYLVANIA, A CORPORATiOX O'F PFNNSYLVANIA. I

YIE LDAB LE DRIVING-GE AR.

Specification of Letters Patent.

Patented Aug. 11, 1908;

Application filed November 6, 1907. Serial No. 401,017.

T 0 all whom it. may concern:

Be it known that I, 'ILLIA G. Scrum- FER, a citizen of the United States, and a resident of the city of Reading, in the county of Berks and State of Pennsylvania, have invented certain new and useful Improvements in Yicldable Driving-Gear, of which the following is a s )ccir'ication.

My invention relates particularly to that class of yieldable wheels in which the rim ortion is joined to the inner portion by a riction connection adapted to permit slipping of one portion upon the other when subected to excessive strain.

The novel features of construction are fully described in connection with the accompanying drawings and are specifically pointed out in the claims,

Figure 1 is a cross-sectional view of a sprocket wheel embodying my invention in preferred form, the section being taken on the line 1-1 of Fig. 2. Fig. 2 IS a partial front elevation of the same. Fig. 3 is a similar view to Fig. 1 indicating a modi'licd construction- In the drawing (1 represents an inner wheel 'section of circular form, provided as shown with a central screw-threaded opening I) for securing the same to a shaft; and 0 re )10- sents the outer or rim section of the w leel which looseiy encircles the inner section (I. These two sections are yieldably connected b Y means of oppositely arranged clamping p ates (I, J, which cover the circular junction of the sections and are drawn together by transverse clamping bolts e, and interposed friction ringsf which are seated in opposed grooves g and it formed respectively in the inner face of the clamping plates and the outer face of the adjacent wheel section.

As shown in Fig. 1 the inner periphery of the rim section c is rotatably fitted upon the outer periphery of the inner wheel section a, so as to be directly centered by the latter and to ride thereon when subjected to slipping strains in actual service; and the clamping plates :1, (I, are both rigidly connected to one of the wheel sections (the inner section aas shown) by passing the clamping bolts 0 through aiined openings therefor formed in the plates and said wheel section at equal distances from the axis of the wheel, while the other wheel-section (c) is merely gripped clamping plates by the tightening up of the clamping screws, this gripping action being operative through the inter )oscd friction rings f bearing in the opposed piate and wheelsection grooves g and 71.. These opposed circular grooves are preferably formed on the two sides of the wheel section, of different diameters, as shown, so that the thickness of said section need be no greater than for a single groove In my improved construction it will be noticed that the web of the wheel is formed partly on the rim section 0 and partly on the inner section a, the circular junction between the sections being thus formed in the web date and the junction covered by the overlapping annular clampiin plates upon the op ositc sides of the assenfbled sections. Whi e I prefer that the outer section 0 should be loosely fitted upon the inner section a as stated so that their joined web por tions form an apparently unbroken web as in Fi". 1 this construction may be modified,as indicated in Fig. 3 where a web space It is left between the sections, through which s )ace the clamping bolts are passed instcai of through bolts holes in one of the sections; the outer or rim section being in this case held concentric with the inner section by the grom'e-cngagcd friction rings interposed between each wheel section and the clamping plates, and the sli )page of one section relative to the other icing free to occur u )on either the outer or the inner wheel section.

What I claim is:-

1. A wheel comprising a circular inner section and a concentric rim section rotatably mounted upon the periphery of said inner section, oppositely arranged annular clamping plates covering the circular junction line of the two sections, and transverse clamping bolts whereby one of said sections is rigidly connected to said plates and the other section yicldingly clamped between the cxtending portions thereof substantially as set forth.

2. A wheel comprising a circular inner section and a concentric rim section rotatably mounted upon the periphery of said inner section, oppositely arranged annular clamp: ing plates covering the circular junction line of the two sections, transverse clamping bolts rigidly connecting one of said sections to the plates, and friction rings seated in opposing grooves in the other section and in the plate lifil'tlODS overlapping the latter subst-antia ly as set forth.

3. A wheel comprising a'circular inner seetion and a rim section loosely encircling it, said inner and rim sections being yieldingly connected by means of oppositely arranged clamping plates overlapping the sections, transverse clamping bolts for said plates, and interposed friction rings of different diameters seated in opposing grooves formed in said plates and in the opposite sides of one of said wheel-sections, substantially as set forth.

4. A wheel comprising a circular inner section and a rim section rotatably fitted there- WM. G. SCH AEFlf-ER. Witnesses:

D. M. STEWART, 4 W. G. STEWART. 

